Update readline7 package (#2965)

Consolidate patch commands

Use new patching/version scheme

Use ftpmirror.gnu.org instead of ftp.gnu.org

packages/readline7.rb

 require 'package'
 
 class Readline7 < Package
+
+  @patchlevel = 5
+
   description 'The GNU Readline library provides a set of functions for use by applications that allow users to edit command lines as they are typed in.'
   homepage 'http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html'
-  version '7.0p3'
-  source_url 'ftp://ftp.gnu.org/gnu/readline/readline-7.0.tar.gz'
+  version "7.0p#{@patchlevel}"
+  source_url 'https://ftpmirror.gnu.org/gnu/readline/readline-7.0.tar.gz'
   source_sha256 '750d437185286f40a369e1e4f4764eda932b9459b5ec9a731628393dd3d32334'
 
   binary_url ({
-    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/readline7-7.0p3-chromeos-armv7l.tar.xz',
-     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/readline7-7.0p3-chromeos-armv7l.tar.xz',
-       i686: 'https://dl.bintray.com/chromebrew/chromebrew/readline7-7.0p3-chromeos-i686.tar.xz',
-     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/readline7-7.0p3-chromeos-x86_64.tar.xz',
   })
   binary_sha256 ({
-    aarch64: '00f60e0dfaf1758614b7d4cbf99d82676dc04d87dd9b94d15cfdc894054a3379',
-     armv7l: '00f60e0dfaf1758614b7d4cbf99d82676dc04d87dd9b94d15cfdc894054a3379',
-       i686: '3e722008118112f734c92fd471b8c10d6fff849e458b5bc09f161bdb419b723a',
-     x86_64: '0593d6f7a957567728cf074762d7f1063cbb880ec5239e3a99829d92f43dd927',
   })
 
-  depends_on 'buildessential' => :build
-  depends_on 'patch' => :build
-  depends_on 'ncurses'
-
   def self.build
-    system "wget -r -N -nd --no-parent ftp://ftp.gnu.org/gnu/readline/readline-7.0-patches/readline70-001 -P readline-7.0-patches"
-    system "wget -r -N -nd --no-parent ftp://ftp.gnu.org/gnu/readline/readline-7.0-patches/readline70-002 -P readline-7.0-patches"
-    system "wget -r -N -nd --no-parent ftp://ftp.gnu.org/gnu/readline/readline-7.0-patches/readline70-003 -P readline-7.0-patches"
-    # system "for i in readline-7.0-patches/*.sig; do gpg $i; done"
-    system "for i in readline-7.0-patches/readline70-???; do patch < $i; done"
-
-    system "CC='gcc' ./configure --libdir=#{CREW_LIB_PREFIX} --disable-static --with-curses"
+    system "wget --recursive --no-parent https://ftp.gnu.org/gnu/readline/readline-7.0-patches/"
+    system "bash -c \"for (( N = 1; N <= #{@patchlevel}; N++ )); do \
+              patch -Np0 -i ftp.gnu.org/gnu/readline/readline-7.0-patches/readline70-00\\\${N}; \
+            done\""
+    system "./configure",
+           "--prefix=#{CREW_PREFIX}",
+           "--libdir=#{CREW_LIB_PREFIX}",
+           "--disable-static",
+           "--with-curses"
     system "make"
   end